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    8 vulnerabilities by TeraTerm Project

    CVE-2026-60060 (GCVE-0-2026-60060)

    Vulnerability from nvd – Published: 2026-07-17 04:13 – Updated: 2026-07-17 04:13
    VLAI
    Summary
    Improper Handling of Length Parameter Inconsistency (CWE-130) vulnerability exists in TTSSH2 plugin of Tera Term provided by TeraTerm Project. When Tera Term attempts to establish an SSH connection to a server set up by an attacker, out-of-bounds read/write may occur. As a result, the contents of adjacent memory regions may be transmitted to the server, and Tera Term may behave unexpected or terminate abnormally.
    Severity
    6.3 (Medium)
    CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:L
    5.1 (Medium)
    CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N
    CWE
    • CWE-130 - Improper handling of length parameter inconsistency
    Assigner
    References
    Impacted products
    Vendor Product Version
    TeraTerm Project TTSSH2 Affected: 1.00 alpha1 , ≤ 3.6.1 (semver)
    		Create a notification for this product.
    Show details on NVD website
    To clipboard 

    {
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "TTSSH2",
          "vendor": "TeraTerm Project",
          "versions": [
            {
              "lessThanOrEqual": "3.6.1",
              "status": "affected",
              "version": "1.00 alpha1",
              "versionType": "semver"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "Improper Handling of Length Parameter Inconsistency (CWE-130) vulnerability exists in TTSSH2 plugin of Tera Term provided by TeraTerm Project. When Tera Term attempts to establish an SSH connection to a server set up by an attacker, out-of-bounds read/write may occur. As a result, the contents of adjacent memory regions may be transmitted to the server, and Tera Term may behave unexpected or terminate abnormally."
        }
      ],
      "metrics": [
        {
          "cvssV3_0": {
            "baseScore": 6.3,
            "baseSeverity": "MEDIUM",
            "vectorString": "CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:L",
            "version": "3.0"
          },
          "format": "CVSS",
          "scenarios": [
            {
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              "value": "GENERAL"
            }
          ]
        },
        {
          "cvssV4_0": {
            "baseScore": 5.1,
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            "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N",
            "version": "4.0"
          },
          "format": "CVSS",
          "scenarios": [
            {
              "lang": "en-US",
              "value": "GENERAL"
            }
          ]
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-130",
              "description": "Improper handling of length parameter inconsistency",
              "lang": "en-US",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-07-17T04:13:38.109Z",
        "orgId": "ede6fdc4-6654-4307-a26d-3331c018e2ce",
        "shortName": "jpcert"
      },
      "references": [
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          "url": "https://teratermproject.github.io/SA/JVN65294474-en.html"
        },
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        },
        {
          "url": "https://jvn.jp/en/jp/JVN65294474/"
        }
      ]
    }
  },
  "cveMetadata": {
    "assignerOrgId": "ede6fdc4-6654-4307-a26d-3331c018e2ce",
    "assignerShortName": "jpcert",
    "cveId": "CVE-2026-60060",
    "datePublished": "2026-07-17T04:13:38.109Z",
    "dateReserved": "2026-07-10T02:15:09.033Z",
    "dateUpdated": "2026-07-17T04:13:38.109Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

    CVE-2026-58317 (GCVE-0-2026-58317)

    Vulnerability from nvd – Published: 2026-07-17 04:14 – Updated: 2026-07-17 04:14
    VLAI
    Summary
    Unsigned to Signed Conversion Error (CWE-196) vulnerability exists in TTSSH2 plugin of Tera Term provided by TeraTerm Project. When Tera Term attempts to establish an SSH connection to a server set up by an attacker, out-of-bounds read/write may occur. As a result, the contents of adjacent memory regions may be transmitted to the server, and Tera Term may behave unexpected or terminate abnormally.
    Severity
    6.3 (Medium)
    CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:L
    5.1 (Medium)
    CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N
    CWE
    • CWE-196 - Unsigned to signed conversion error
    Assigner
    References
    Impacted products
    Vendor Product Version
    TeraTerm Project TTSSH2 Affected: 1.00 alpha1 , ≤ 3.6.1 (semver)
    		Create a notification for this product.
    Show details on NVD website
    To clipboard 

    {
  "containers": {
    "cna": {
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        {
          "defaultStatus": "unaffected",
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          "vendor": "TeraTerm Project",
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            {
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              "status": "affected",
              "version": "1.00 alpha1",
              "versionType": "semver"
            }
          ]
        }
      ],
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        {
          "lang": "en",
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        }
      ],
      "metrics": [
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          },
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          },
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          "scenarios": [
            {
              "lang": "en-US",
              "value": "GENERAL"
            }
          ]
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-196",
              "description": "Unsigned to signed conversion error",
              "lang": "en-US",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-07-17T04:14:03.592Z",
        "orgId": "ede6fdc4-6654-4307-a26d-3331c018e2ce",
        "shortName": "jpcert"
      },
      "references": [
        {
          "url": "https://teratermproject.github.io/SA/JVN65294474-en.html"
        },
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        },
        {
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  },
  "cveMetadata": {
    "assignerOrgId": "ede6fdc4-6654-4307-a26d-3331c018e2ce",
    "assignerShortName": "jpcert",
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    "datePublished": "2026-07-17T04:14:03.592Z",
    "dateReserved": "2026-07-10T02:15:08.138Z",
    "dateUpdated": "2026-07-17T04:14:03.592Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

    CVE-2017-2193 (GCVE-0-2017-2193)

    Vulnerability from nvd – Published: 2017-06-09 16:00 – Updated: 2024-08-05 13:48
    VLAI
    Summary
    Untrusted search path vulnerability in the installer of Tera Term 4.94 and earlier allows an attacker to gain privileges via a Trojan horse DLL in an unspecified directory.
    Severity
    No CVSS data available.
    CWE
    • Untrusted search path vulnerability
    Assigner
    References
    URL Tags
    http://www.securityfocus.com/bid/98807 vdb-entryx_refsource_BID
    http://jvn.jp/en/jp/JVN06770361/index.html third-party-advisoryx_refsource_JVN
    https://ttssh2.osdn.jp/SA/JVN06770361.html.en x_refsource_CONFIRM
    Impacted products
    Date Public
    2017-06-01 00:00
    Show details on NVD website
    To clipboard 

    {
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        "references": [
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            ],
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          },
          {
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            ],
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          }
        ],
        "title": "CVE Program Container"
      }
    ],
    "cna": {
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        {
          "product": "The installer of Tera Term",
          "vendor": "TeraTerm Project",
          "versions": [
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            }
          ]
        }
      ],
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        }
      ],
      "problemTypes": [
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            }
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      ],
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        "dateUpdated": "2017-06-12T09:57:01.000Z",
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}

    CVE-2026-58317 (GCVE-0-2026-58317)

    Vulnerability from cvelistv5 – Published: 2026-07-17 04:14 – Updated: 2026-07-17 04:14
    VLAI
    Summary
    Unsigned to Signed Conversion Error (CWE-196) vulnerability exists in TTSSH2 plugin of Tera Term provided by TeraTerm Project. When Tera Term attempts to establish an SSH connection to a server set up by an attacker, out-of-bounds read/write may occur. As a result, the contents of adjacent memory regions may be transmitted to the server, and Tera Term may behave unexpected or terminate abnormally.
    Severity
    6.3 (Medium)
    CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:L
    5.1 (Medium)
    CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N
    CWE
    • CWE-196 - Unsigned to signed conversion error
    Assigner
    References
    Impacted products
    Vendor Product Version
    TeraTerm Project TTSSH2 Affected: 1.00 alpha1 , ≤ 3.6.1 (semver)
    		Create a notification for this product.
    Show details on NVD website
    To clipboard 

    {
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "TTSSH2",
          "vendor": "TeraTerm Project",
          "versions": [
            {
              "lessThanOrEqual": "3.6.1",
              "status": "affected",
              "version": "1.00 alpha1",
              "versionType": "semver"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "Unsigned to Signed Conversion Error (CWE-196) vulnerability exists in TTSSH2 plugin of Tera Term provided by TeraTerm Project. When Tera Term attempts to establish an SSH connection to a server set up by an attacker, out-of-bounds read/write may occur. As a result, the contents of adjacent memory regions may be transmitted to the server, and Tera Term may behave unexpected or terminate abnormally."
        }
      ],
      "metrics": [
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            "baseSeverity": "MEDIUM",
            "vectorString": "CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:L",
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}

    CVE-2026-60060 (GCVE-0-2026-60060)

    Vulnerability from cvelistv5 – Published: 2026-07-17 04:13 – Updated: 2026-07-17 04:13
    VLAI
    Summary
    Improper Handling of Length Parameter Inconsistency (CWE-130) vulnerability exists in TTSSH2 plugin of Tera Term provided by TeraTerm Project. When Tera Term attempts to establish an SSH connection to a server set up by an attacker, out-of-bounds read/write may occur. As a result, the contents of adjacent memory regions may be transmitted to the server, and Tera Term may behave unexpected or terminate abnormally.
    Severity
    6.3 (Medium)
    CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:L
    5.1 (Medium)
    CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N
    CWE
    • CWE-130 - Improper handling of length parameter inconsistency
    Assigner
    References
    Impacted products
    Vendor Product Version
    TeraTerm Project TTSSH2 Affected: 1.00 alpha1 , ≤ 3.6.1 (semver)
    		Create a notification for this product.
    Show details on NVD website
    To clipboard 

    {
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          "vendor": "TeraTerm Project",
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              "versionType": "semver"
            }
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        }
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        }
      ],
      "metrics": [
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            "vectorString": "CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:L",
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              "description": "Improper handling of length parameter inconsistency",
              "lang": "en-US",
              "type": "CWE"
            }
          ]
        }
      ],
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    "dateUpdated": "2026-07-17T04:13:38.109Z",
    "state": "PUBLISHED"
  },
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}

    CVE-2017-2193 (GCVE-0-2017-2193)

    Vulnerability from cvelistv5 – Published: 2017-06-09 16:00 – Updated: 2024-08-05 13:48
    VLAI
    Summary
    Untrusted search path vulnerability in the installer of Tera Term 4.94 and earlier allows an attacker to gain privileges via a Trojan horse DLL in an unspecified directory.
    Severity
    No CVSS data available.
    CWE
    • Untrusted search path vulnerability
    Assigner
    References
    URL Tags
    http://www.securityfocus.com/bid/98807 vdb-entryx_refsource_BID
    http://jvn.jp/en/jp/JVN06770361/index.html third-party-advisoryx_refsource_JVN
    https://ttssh2.osdn.jp/SA/JVN06770361.html.en x_refsource_CONFIRM
    Impacted products
    Date Public
    2017-06-01 00:00
    Show details on NVD website
    To clipboard 

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    JVNDB-2026-000099

    Vulnerability from jvndb - Published: 2026-07-16 14:02 - Updated:2026-07-16 14:02
    Severity
    6.3 (Medium) - cvssV3_0 - CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:L
    Summary
    Multiple vulnerabilities in TTSSH2 plugin of Tera Term
    Details
    TTSSH2 plugin of Tera Term provided by TeraTerm Project contains the following vulnerabilities:
    • Unsigned to Signed Conversion Error (CWE-196) - CVE-2026-58317
    • Improper Handling of Length Parameter Inconsistency (CWE-130) - CVE-2026-60060
    CVE-2026-58317 Yukihiro Nakamura reported this vulnerability to IPA. JPCERT/CC coordinated with the developer under Information Security Early Warning Partnership. CVE-2026-60060 TeraTerm Project reported these vulnerabilities to JPCERT/CC to notify users of the solutions through JVN.
    References
    Impacted products
    Show details on JVN DB website
    To clipboard 

    {
  "@rdf:about": "https://jvndb.jvn.jp/en/contents/2026/JVNDB-2026-000099.html",
  "dc:date": "2026-07-16T14:02+09:00",
  "dcterms:issued": "2026-07-16T14:02+09:00",
  "dcterms:modified": "2026-07-16T14:02+09:00",
  "description": "TTSSH2 plugin of Tera Term provided by TeraTerm Project contains the following vulnerabilities:\u003ca href=\u0027https://cwe.mitre.org/data/definitions/196.html\u0027 target=\u0027_blank\u0027\u003e\u003c/a\u003e\u003ca href=\u0027https://cwe.mitre.org/data/definitions/130.html\u0027 target=\u0027_blank\u0027\u003e\u003c/a\u003e\u003cul\u003e\u003cli\u003eUnsigned to Signed Conversion Error (CWE-196) - CVE-2026-58317\u003c/li\u003e\u003cli\u003eImproper Handling of Length Parameter Inconsistency (CWE-130) - CVE-2026-60060\u003c/li\u003e\u003c/ul\u003eCVE-2026-58317\r\nYukihiro Nakamura reported this vulnerability to IPA.\r\nJPCERT/CC coordinated with the developer under Information Security Early Warning Partnership.\r\n\r\nCVE-2026-60060\r\nTeraTerm Project reported these vulnerabilities to JPCERT/CC to notify users of the solutions through JVN.",
  "link": "https://jvndb.jvn.jp/en/contents/2026/JVNDB-2026-000099.html",
  "sec:cpe": {
    "#text": "cpe:/a:tera_term_project:ttssh2",
    "@product": "TTSSH2",
    "@vendor": "TeraTerm Project",
    "@version": "2.2"
  },
  "sec:cvss": {
    "@score": "6.3",
    "@severity": "Medium",
    "@type": "Base",
    "@vector": "CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:L",
    "@version": "3.0"
  },
  "sec:identifier": "JVNDB-2026-000099",
  "sec:references": [
    {
      "#text": "https://jvn.jp/en/jp/JVN65294474/index.html",
      "@id": "JVN#65294474",
      "@source": "JVN"
    },
    {
      "#text": "https://www.cve.org/CVERecord?id=CVE-2026-58317",
      "@id": "CVE-2026-58317",
      "@source": "CVE"
    },
    {
      "#text": "https://www.cve.org/CVERecord?id=CVE-2026-60060",
      "@id": "CVE-2026-60060",
      "@source": "CVE"
    },
    {
      "#text": "https://www.ipa.go.jp/en/security/vulnerabilities/cwe.html",
      "@id": "CWE-Other",
      "@title": "No Mapping(CWE-Other)"
    }
  ],
  "title": "Multiple vulnerabilities in TTSSH2 plugin of Tera Term"
}

    JVNDB-2017-000108

    Vulnerability from jvndb - Published: 2017-06-01 14:42 - Updated:2018-01-24 14:20
    Severity
    7.8 (High) - cvssV3_0 - CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
    Summary
    Installer of Tera Term may insecurely load Dynamic Link Libraries
    Details
    The installer of Tera Term provided by TeraTerm Project contains an issue with the DLL search path, which may lead to insecurely load Dynamic Link Libraries (CWE-427). Eili Masami of Tachibana Lab. reported this vulnerability to IPA. JPCERT/CC coordinated with the developer under Information Security Early Warning Partnership.
    References
    Impacted products
    Show details on JVN DB website
    To clipboard 

    {
  "@rdf:about": "https://jvndb.jvn.jp/en/contents/2017/JVNDB-2017-000108.html",
  "dc:date": "2018-01-24T14:20+09:00",
  "dcterms:issued": "2017-06-01T14:42+09:00",
  "dcterms:modified": "2018-01-24T14:20+09:00",
  "description": "The installer of Tera Term provided by TeraTerm Project contains an issue with the DLL search path, which may lead to insecurely load Dynamic Link Libraries (CWE-427).\r\n\r\nEili Masami of Tachibana Lab. reported this vulnerability to IPA.\r\nJPCERT/CC coordinated with the developer under Information Security Early Warning Partnership.",
  "link": "https://jvndb.jvn.jp/en/contents/2017/JVNDB-2017-000108.html",
  "sec:cpe": {
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    "@product": "The installer of Tera Term",
    "@vendor": "TeraTerm Project",
    "@version": "2.2"
  },
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      "@severity": "Medium",
      "@type": "Base",
      "@vector": "AV:N/AC:M/Au:N/C:P/I:P/A:P",
      "@version": "2.0"
    },
    {
      "@score": "7.8",
      "@severity": "High",
      "@type": "Base",
      "@vector": "CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H",
      "@version": "3.0"
    }
  ],
  "sec:identifier": "JVNDB-2017-000108",
  "sec:references": [
    {
      "#text": "https://jvn.jp/en/jp/JVN06770361/index.html",
      "@id": "JVN#06770361",
      "@source": "JVN"
    },
    {
      "#text": "https://jvn.jp/en/ta/JVNTA91240916/index.html",
      "@id": "JVNTA#91240916",
      "@source": "JVN"
    },
    {
      "#text": "https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2017-2193",
      "@id": "CVE-2017-2193",
      "@source": "CVE"
    },
    {
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      "@id": "CVE-2017-2193",
      "@source": "NVD"
    },
    {
      "#text": "https://www.ipa.go.jp/en/security/vulnerabilities/cwe.html",
      "@id": "CWE-Other",
      "@title": "No Mapping(CWE-Other)"
    }
  ],
  "title": "Installer of Tera Term may insecurely load Dynamic Link Libraries"
}